Impact of L2S interface on system level evaluation for LTE system

The wireless communication systems have been developed and evaluated mainly based on computer simulation. One challenge has arisen that the whole simulation of the wireless system becomes almost impractical to simulate in a one simulation scheme due to the complexity of the system, the huge number of optimization parameters and huge time consumption. The proposed solution is to divide the whole simulation to two main levels which is commonly called the Link Level Simulation (LLS) and the System Level Simulation (SLS). Further, an interface is needed for the connection between the two levels and the interface is needed to transfer the measured data between the two levels. The interface is called Link-to-System (L2S) interface. The interface plays also as an abstraction model of the link level performance and it is being used in the system level simulation. The L2S interface plays a crucial role in the evaluation of the wireless system in terms of accuracy, simplicity and generality. The L2S interface accuracy and performance depends on different mapping models such as Exponential Effective SINR Mapping (EESM) model and Mutual Information Effective SINR Mapping (MIESM) model. Therefore, this paper investigates the impact of L2S interface on the system level evaluation. As a result, the MIESM and EESM model in terms of throughput gain show a high performance in the overall performance of wireless system evaluation utilizing L2S interface technique.